JP4949193B2 - オーディオパワーアンプ - Google Patents
オーディオパワーアンプ Download PDFInfo
- Publication number
- JP4949193B2 JP4949193B2 JP2007274544A JP2007274544A JP4949193B2 JP 4949193 B2 JP4949193 B2 JP 4949193B2 JP 2007274544 A JP2007274544 A JP 2007274544A JP 2007274544 A JP2007274544 A JP 2007274544A JP 4949193 B2 JP4949193 B2 JP 4949193B2
- Authority
- JP
- Japan
- Prior art keywords
- mode
- output
- channel
- audio signal
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
- H03F3/187—Low frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/414—A switch being coupled in the output circuit of an amplifier to switch the output on/off
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/537—A transformer being used as coupling element between two amplifying stages
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/541—Transformer coupled at the output of an amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/20—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F2203/21—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F2203/211—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
- H03F2203/21109—An input signal being distributed by switching to a plurality of paralleled power amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/20—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F2203/21—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F2203/211—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
- H03F2203/21145—Output signals are combined by switching a plurality of paralleled power amplifiers to a common output
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/007—Protection circuits for transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
Description
Industries Alliance)規格に準拠するキャビネット・ラックに装着されるものがある。
P=E2/Z ∴E={P・Z}1/2
ここで、Pは、増幅回路12の最大出力、Zは、増幅回路12の出力インピーダンスである。
12,12a 増幅回路
16,42 リレー
18,18a 変圧器
20,20a 1次側巻線
26,26a 2次側巻線
Claims (6)
- それぞれオーディオ信号が入力される複数の増幅手段と、
上記複数の増幅手段に対応して設けられておりそれぞれ対応する該増幅手段によって増幅された増幅後オーディオ信号が1次側に入力される複数の変圧器と、
第1モードおよび第2モードのいずれか一方を任意に選択するモード選択手段と、
を具備し、
上記複数の変圧器それぞれの2次側は、上記増幅後オーディオ信号の電圧を所定の第1電圧に変圧する第1部分と、該増幅後オーディオ信号の電圧を該第1電圧よりも低い第2電圧に変圧する第2部分と、を有しており、
上記第1モードにおいては、上記複数の増幅手段に個別の上記オーディオ信号が入力されると共に、上記それぞれの2次側の上記第1部分から個別に出力される複数の第1変圧後オーディオ信号が外部に出力され、
上記第2モードにおいては、上記複数の増幅手段に同一の上記オーディオ信号が入力されると共に、上記それぞれの2次側の上記第2部分から個別に出力される複数の第2変圧後オーディオ信号が互いに合成されることによって上記第1電圧と同電圧の合成オーディオ信号が生成され、該合成オーディオ信号が上記外部に出力される、
オーディオパワーアンプ。 - 上記モード選択手段は、上記複数の増幅手段に上記個別のオーディオ信号を入力する第1状態と、該複数の増幅手段に上記同一のオーディオ信号を入力する第2状態と、のいずれか一方に切り換わる入力側切換手段を含み、
上記入力側切換手段は、上記第1モードのとき上記第1状態となり、上記第2モードのとき上記第2状態となる、
請求項1に記載のオーディオパワーアンプ。 - 上記モード選択手段は、上記それぞれの2次側の上記第2部分を互いに直列接続することによって上記合成オーディオ信号を生成するための合成手段を形成する第3状態と、該直列接続を解除することによって該合成手段を非形成とする第4状態と、のいずれか一方に切り換わる出力側切換手段を含み、
上記出力側切換手段は、上記第1モードのとき上記第4状態となり、上記第2モードのとき上記第3状態となる、
請求項1または2に記載のオーディオパワーアンプ。 - 上記それぞれの2次側の上記第2部分は上記第1部分の一部である、
請求項1ないし3のいずれかに記載のオーディオパワーアンプ。 - 上記第2電圧の値は上記第1電圧の値を上記増幅手段の数で除した値に略等しい、
請求項1ないし4のいずれかに記載のオーディオパワーアンプ。 - 上記複数の増幅手段と上記複数の変圧器と上記モード切換手段とは同一の筺体に収容されている、
請求項1ないし5のいずれかに記載のオーディオパワーアンプ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007274544A JP4949193B2 (ja) | 2007-10-23 | 2007-10-23 | オーディオパワーアンプ |
PCT/JP2008/068276 WO2009054265A1 (ja) | 2007-10-23 | 2008-10-08 | オーディオパワーアンプ |
EP08841759.7A EP2202880B1 (en) | 2007-10-23 | 2008-10-08 | Audio power amplifier |
CN200880107251.2A CN101803185B (zh) | 2007-10-23 | 2008-10-08 | 音频功率放大器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007274544A JP4949193B2 (ja) | 2007-10-23 | 2007-10-23 | オーディオパワーアンプ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009105585A JP2009105585A (ja) | 2009-05-14 |
JP4949193B2 true JP4949193B2 (ja) | 2012-06-06 |
Family
ID=40579371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007274544A Active JP4949193B2 (ja) | 2007-10-23 | 2007-10-23 | オーディオパワーアンプ |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2202880B1 (ja) |
JP (1) | JP4949193B2 (ja) |
CN (1) | CN101803185B (ja) |
WO (1) | WO2009054265A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8384478B2 (en) * | 2010-03-04 | 2013-02-26 | Bose Corporation | Versatile audio power amplifier |
KR101122215B1 (ko) * | 2010-03-08 | 2012-03-20 | 주식회사 다원시스 | 화학 기상 증착 장치용 전원 장치 및 그 제어 방법 |
CN103812458A (zh) * | 2014-01-27 | 2014-05-21 | 合肥师范学院 | X波段单片功率放大器 |
US9515749B2 (en) * | 2015-05-07 | 2016-12-06 | Qualcomm Incorporated | Low noise amplifier module with output coupler |
CN111885462B (zh) * | 2020-07-17 | 2022-08-05 | 上海艾为电子技术股份有限公司 | 音频功放电路及其功放模式控制方法、电子设备 |
CN116827362B (zh) * | 2023-08-29 | 2023-12-22 | 上海移芯通信科技股份有限公司 | 一种射频电路、芯片、多频段接收设备及频段切换方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8105371A (nl) * | 1981-11-27 | 1983-06-16 | Philips Nv | Inrichting voor het aansturen van een of meer omzeteenheden. |
JPS58132495U (ja) * | 1982-03-01 | 1983-09-07 | 三洋電機株式会社 | 音声出力回路 |
JPS6047316U (ja) * | 1983-09-09 | 1985-04-03 | 日本コロムビア株式会社 | 増幅装置 |
US4625013A (en) | 1984-12-20 | 1986-11-25 | General Electric Company | Aromatic sulfoxy compositions and method for their preparation |
JPS62271509A (ja) * | 1986-05-20 | 1987-11-25 | Matsushita Electric Ind Co Ltd | 昇圧トランス型増幅器 |
JPH0226892A (ja) * | 1988-07-15 | 1990-01-29 | Fujitsu Ltd | 分子線エピタキシャル成長方法及び装置 |
JPH0226892U (ja) * | 1988-08-05 | 1990-02-21 | ||
JPH03141800A (ja) * | 1989-07-19 | 1991-06-17 | Nishi Denko:Kk | 音響機器システム |
JPH085370Y2 (ja) * | 1989-12-26 | 1996-02-14 | エヌティエヌ株式会社 | 通電用転がり軸受 |
JP3317324B2 (ja) | 1995-08-30 | 2002-08-26 | ティーオーエー株式会社 | スピーカラインの検査装置 |
JP4674474B2 (ja) * | 2005-02-24 | 2011-04-20 | パナソニック株式会社 | パラレル駆動バイアンプ切換回路 |
WO2007080879A1 (ja) * | 2006-01-10 | 2007-07-19 | Pioneer Corporation | 音声信号処理装置 |
-
2007
- 2007-10-23 JP JP2007274544A patent/JP4949193B2/ja active Active
-
2008
- 2008-10-08 CN CN200880107251.2A patent/CN101803185B/zh active Active
- 2008-10-08 WO PCT/JP2008/068276 patent/WO2009054265A1/ja active Application Filing
- 2008-10-08 EP EP08841759.7A patent/EP2202880B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
JP2009105585A (ja) | 2009-05-14 |
CN101803185A (zh) | 2010-08-11 |
CN101803185B (zh) | 2013-08-14 |
EP2202880A1 (en) | 2010-06-30 |
EP2202880A4 (en) | 2012-02-29 |
EP2202880B1 (en) | 2013-08-21 |
WO2009054265A1 (ja) | 2009-04-30 |
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